Transparency mount and method of making same



qlFam. 17, 1950 E. G. SEARY 2,495,142

TRANSPARENCY Moum` AND METHOD oF MAKING SAME Filed Oct. 9, 1948 MM fi-WM i' BY Patented Jan. 17, 1950 UNITED STATES V PATENT OFFICE V-TRAN'SPARENCY MOUNT AND METHOD Y OF MAKING SAME Eugene G. Scary, Hastings on Hudson, N. Application October 9, 1948, Serial No. 53,735 claims. (c1. io- 158) type formed from a paper'blank having two side-` by side apertures which may be brought intoregister by folding into parallelism the two sections,

or flap portions of the blank at opposite sidesv of a foldY line between the two apertures. The transparency included in such a mount, extends across the registering aperturesand has a rim or marginal portionbetweenportions of the sections adjacent and surrounding the apertures. Each i section thus forms a frame surrounding the picture or image1 on the transparency which may` be projected onto photographic material by a projection printer,or onto a screen by aprojector of the typeemployed for screen exhibition purposes. I

Ordinarily,rit is practically essentiall that the rim portion of the transparencyiwhichrextends between the sections of the mount should be substantially in register with, and bear against, aV

seat formed by a predetermined portion of one of the sections surrounding and adjacent theY aperture in the latter. Toj facilitate the proper placing or seating ofthe transparency on the desired seat portion .of.one of the frame sections,

' character that the projections may be obliterated tofore employed, of which I have knowledge, has

been opento the objection thatrits use results in the'production of finished mounts which vdo desirable, and insure when suchV mounts' are inA serted in projectionrapparatus, its transparency,L will lie in a predeterminedplane.` Furthermore,

such deformation of the blank bythe methods;

heretofore used have usually involved blank cutting operations which undesirably weaken the mount structure.

The primary object of the present invention is to provide a paper mount section with integral ably flat sides.

-cardboard mounts, seat outlining projections are after the transparency is properly placed between the two mount sections or flaps, so that in the finished mount, the section will have suit- In my novel method of making so formed by a blank indenting or embossing action thatA the projections may be subsequently eliminated by subjecting the mount to pressure.

In practice, the projections are ordinarily eliminated by the pressure applied to the mount to cause' adhesive material between the adjacent sides of -the two sections to form an adhesive bond between the portions of said sides in contact with one another. The adhesive material employed may vary widely in composition, and may be appliedin any manner. In particular, the adhesive material composition and mode of application may be any of those heretofore successfully employed in the production of mounts of the generalv type described. Thus the adhesive agent used may be of the type used in what is commonly known as Scotch tape, comprising a layer of a tacky adhesive such as a rubber or vinyl compound which 'is applied to a mount surface to be bonded to another mount surface when the two surfaces are pressed together. Alternatively,

one at least of the blank surfaces'to be bonded together'may be given a dry coating formed of an `adhesive material, such as an animal glue which In` the form of the present invention which I l now consider preferable, the adhesive material is .of a pressure sensitive type adapted to form a goodl bond between the adjacent sides 0f the folded blank sections when suitably heated and subjected to a suitable pressure.

[In .oneiorm oi` the invention, the bond connecting'two sections of the blank and sealing the transparency between them, isformed in a single stage oroperation, while in a second form olf the invention, a bond is formed between portions of the sections in one operation before the trans- ,"parency is inserted between the sections, and

subsequently the transparency is inserted beprojections which outline the transparency seat x portion of thesection, and which are of such tweenthe blank sections, and the latter are subje cted to a second bonding operati-on which seals the Ytransparency .in place and completes the jbond between thesections. l

The various features of novelty which characterize my invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, however, its advantages, and specific objects attained with its use, reference should be had to the accompanying drawing and descriptivematter in which I have illustrated and described preferred embodiments of the invention.

Fig. 1 is a plan View of an unfolded a'perturedv mount forming blank with a transparency engaging a seat portion at one side of one section of the blank;

Fig. 2 is a section through a portion of the blank en the line 2 2 of Fig. 1;'

Fig. 3 is a section through the finished mountV taken on the line 2-2 of Fig. 1;

Fig. 4 is an elevation of.a mount forming press;

Fig. 5 is a plan view of one of the press platens; and

Fig. 6 is a plan view of av modied form of the platen show'ii in 5".

In Figs. 1, 2- aiidS, I- have illustrated the preferred form of my invention for use in the production of a mount in which a transparency is sealed in a rr'lcunt aridthe sections ofthe mount are's'ealed together in a single operation. The mount forming paper blank Cshown in Figs. 1, 2 and 3cr'nplises two substantially similar sections A and B formed with apertures a` and b, respectively, which are brought into register when the blank is folded aboutV a fold line D betweenthe apertures w andb. As shown in Fig. 2, the score line Dis dened. by an incision ex.-

tending into the lower portion. of the blank Cl from the underside of the latter, as seen in Figs. 1 and2. The blank sections A and Bare shown parency so that projections F may be given adequate height by an embossing or indenting action without cutting or shearing the blank to an extent materially weakening the blank or interfering with its return to its desired flat form when subjected to suitable pressure. That pressure may be the pressure desirably employed in the final mount forming operation tovestablish a thin adhsive bond between the sides of the sections A and B in contact with one another.

As previously indicated, the shape and dimensions of the blank sections A and B and apertures a andb are not critical and may vary as the conditions, of use make desirable. Merely by way of illustration and example and not by way of limitation, it is noted, however, that the drawings illustrate a mountl designed for use in a projection printer in commercial use in reproducing "color picture transparencies, each about 1% of as similar squares andtheapertures a and b are shown as similar. rectangles with rounded corners and having sides transverse to the fold line D which are longer than its4 sides parallel to the.

fold line, but theshapes ofthe sectionsA and B.,

and apertures a andbe. maybemodifiedas con ditions make desirable. In ordinary practice,

however, the sections A. and Brwill be generally Similar in shape. and-.dunerisiens and the apertures a.. and b will be shapedand proportioned,4 relative to the transparency Whichis to extend across thel registering apertures so lthat a predeterminedmerenal Dertien. of the transparency Emay. be held.betweenthesections or flaps A andB, asshown in Figi 3. As shown, the section B. is provided with `a seat Fiorthe transparency., E, which is outlined byprojections G extending upward at the upper sidevof the section B as seen in Figs.- 1 and 2. The. seat F is shown as rectan-` gular in outlinev and hasv each of, its four` sides in engagement with eachof aplurality of projections Garranged in a row between the adjacent.

edgeof theA transparency, and. the adjacent outerjY so that thetransparencyinay be manually moved rapidly into the posil'ii'c'lnV on the section Bin which it is in accurate register with the seat F.A

In ordinary practice, the' thicknessY of the blank4 C sufficiently exceeds that ofL the thin transe an inch wide and about` 11%A inches long. The sections A and; B. of the mount irl which said transparencies are mounted are eachslightly less thanainchessquare. While the apertures a and In'theioririshown, eachpr'ojection G may be? formed by apunch which may be Ik" in diam-s eter, and has. onel end bevelledv on 'so that the upper end. ofy each` projection is inclined aty a small angle", for example, an angle of 30 to theplane of section B. As shownin Figs.- 1 and 2, the.

inclined upper end surface; of each projection G merges into the upper flat surface of the section B at the ends of an arc cf-less than Each uprising projection Gis, thus in the formofl a portion 'of` a cylinder transverse to'l the upper surface ofrtl'ies'ection and having its convex side substantially tangenttothe adjacent side edge' of the' seat F; With the Vprojection G shaped` and formed as` described, the blank shearing.

effect, atteiidingthe formation of each projeci tionmay. b confined to the separation of relatively. small convex and concave .blankv portions adjacent the crownof the curved edge of the prcijectiOnsee in Fig. 1. As shown, there are l .four projeetioascfat each end/ef the seatF, and.

rive' projections Gat each side ofi-theseatF.

While as previously indicated, the adhesive material u s'ed 'to'` bonu the sections. A- and B. 1:0- gether when in Contact, as4 shown in Fig. 3, may vary in composition and: inthe manner of its application, I preferablyeiiiploy. an adhesive materiali suoli. as y'cliciz'ed rubber, polyvinyl acetate er nitrocellulose. which is` applied in a fluid'or semi-huid een itioiito the entire .upper- .side of tlieiblankf as seen. invFig. l, and which dries tafoiil a solid'r coating which when atv ordinary atmospheric tmperatures,.wi1lnot ade. here to surfaz'esirlv contactherewlth, ibutjwhen.. heated.l to. a softening, temperature becomes. .sticky .andI willlfforl'n a .strong and durable adtogether'.` While the adhesivel is being softened andv thelatter.. is. their, cooled to` normal atmos- .pheric temperature., It. is possi-blel to form the.

ananas bond between the sections A' and B when coated with adhesive material of the characterspecied,y For example, the sections'mayand subjecting the mount to a transverse pressure of a couple of pounds or so per square inch.

In the commercial use of the invention, `howv ever, the bonding operation may advantageously be carried out in a suitable power press having at least one platen electrically heated. Such a press may be of the type diagrammatically illus trated in Figs. 4 and 5, which comprises anormally stationary lower pl-aten I, and a superposed vertically movable platen J. As diagrammate ically shown in Fig. 4, the platen J is carried by end of the cylinder K in response to the adjust-`V ment of a valve mechanism L. As shown in Fig.

5, the platen I is formed with an opening or cavity i which may have horizontal dimensions substantially the same as, or slightly larger than those of the transparency E held in the mounthaving its sections A and B bonded together while the portions of said sections surrounding the transparency are compressed between the platens I and J. Thel platen J is formed with av` similar opening cavity or well i, similar in shape to, and in register with the opening or cavity i.' In practice, I have found it advantageous to subject the portions of the mount clamped between the platens I and J to a pressure of a couple'hunj dred pounds per square inch. As previously indicated, the bond between the mount sectionsA and B may be established by a pressure of a couple of pounds per square-inch or so. The use of the pressure of 200 pounds or So per square inch is'advantageusbecause it materially speeds up the bonding oper-ation, largely,-I believe, `because the greater rapidity with which the adhesive material is heated to a softening temperasuitably rapid elimination of the projections and indentations formed by the embossingl action which produces'the projections G.

With thebonding pressure applied to the blank betweenV the platens-I-and- J as described,- the adhesive material between the sections A- and-"B and the marginal portion of the transparency. does not adhere to the latter. In consequence, the transparency is free to expand and contract the portion' `Aofftlie blankat the right of the aperture b as seen in Fig. 1. In such modied form of the inverition,E the formationof the mount with a transparencysealed therein comprises two bonding operations, in each of which the foldedv` blankfsections 'are subjected `to pressure and a portion ofthe adhesive bond between them is v formed. v- Y Ihe eiect of the rst bonding operation is to establish-a loondbetweenV portions of the sections above-tand below, and at the left hand side of the aperture b, as 5seen in Fig. 1, but does not bond togetherthe portionsiof thesections at the right hand side'of the -aperture b asseen in Fig. 1. 'The"fi`rst bondingl operation may be readily oarrie'd out in a press differingY from that shown in Fig. 4 only by the replacement of the lower platen I bytheplaten IA shown in Fig. 6. The platen IAdiiTers'from the fplaten I, in that it includes Af'no portion-corresponding to the portion of the platen Iat the Vrighi; of the platen aperture ia. Stated differentlyythe aperture za of Fig. 6 is open atits right'l'ha'nd end, Aand is elongated so that itxtends tothe right hand end of the platen.

only a tiallyvatte'ned in the initial bonding uencei-after theinitial bonding operation'j'js4 4nrrjp'leted, a transparency may be pushed into the thin spacebetw'een thel portions i 'of'the'blank sections at the'margin of the aperntures varjandb' therein, and at the side of the secin response to changes in its temperature and has no tendency to buckle as a result of such expansion. The term transparency as used in the appended claims is intended to designate and include transparent and semi-transparent bodies such as photographic positives and negatives bearing images or designs which may be visually observed when light is transmitted through said bodies.

The procedure hereinbefore described in detail results in the formation of the mount shown in Fig. 3 in which the transparency E is sealed in place and the entire bond between the blank sections A and B is formed in a single press operation. In a modied form of the invention, the mount is formed from a blank which may be exactly like the blank C shown in Fig. 1 except that the projections at one side of the aperture b are preferably omitted. In the preferred form of the invention now to be described, the blank portion from which the projections are omitted is 'tions' remotefromthefold line D, andinto en gagement with the projections G at the upper and lower side'san'd left hand end of theaperture b.`A fter a transparency has thus been put into place in'ithe partially finished mount, the latter is subjected lto Va secondibonding operation in which `substantially all of the projections G are pressed back ,into' the vsection B, and in which thepreviou yjunbonded'portions ofthe section s. j t unt and immediture, and also because it effects a suitable and'- 4 "at the mgm and end of he'mo wAs will be apparenti,v the mount in the partially completedfform in whichit is left at the end of the first bonding operationconstitutes an article of manufacture which may be sold to, and used by amateur photographers and other users. In such case, each mount may be completed by the user after inserting a transparency into the mount so that it extends across the registering apertures a and b and engages the projections G at three sides of the aperture a. In such case, the final bonding operation may well be effected by the use of a hot nat-iron manually pressed against the upper side of the mount, though where desirable, the second bonding operation may be effected by the use of a press of the form collectively shown by Figs. 4 and 5.

While in accordance with the provisions of the statutes, I have illustrated and described the best forms of embodiment of my invention now known to me, it will be apparent to those skilled in the art that changes may be made in the forms of the apparatus disclosed without departing from the spirit of my invention as set forth in the appended claims, and that in some cases certain features of my invention may be used to advantage without a corresponding use of other features.

Having now described my invention, what I line betweenltwn sirio by sidetseotonsgoff Said-.f1 5:

blank, and having an. apertura in each; section; in positionY to register Withthegaperture inthe-il other section when the blank is folded onfsaidg, fold line-to bringone-sidef-oi eaehsetioninto contact with onesidep;thelgother; Whichf 10g;

consists in embossing the blanlc tot `for-Improieci tions extending away from saidone sidefrone.V of said sections and distributed along the ontereedse .of a portion tof thesection surrounding :the-y maior portion, atrleastcff;the;fnerturetherein` 151.. i

v.at;,.least of said seat, and to substantially -force and thereby` defining; a transparency seaapplyfing adhesive material to one`V at, least- 0i.: said`4 sections, placing a transparencyon, s aid` seat,' folding the blanken saidg fold liriegto,X bringlgsaidf section `sides into contact-. with one :motherand 29k.

to bring said apertures` intomegistexg andv sub,-AA jecting the'folded blankto transversepressu r e= forcing substantially al1 of s the projections.. baclo into V`the body ofthe blankseetionof which they? form a part, and establishing,an millesimi.bondi gg,

between the contacting sections-. 4 A

2. A method as; specied in claimil' inwhich.; the projections are distributed; a1ong tl 1e o u-tex; edge of a portion of the section surrounding.ther

entire aperture and in which -the. projections ar-3o,..

pressed backl intothe body of thefb'lankand in.,y which the pressure. forcing4 substantallygallo; the projections back into thebodyiofgthegblane: section and establishing an adhesive bo1jid between the contacting sections is, appliedin, :1:85,

single operation.-

3. A method as ispccied-gi'n claim Lin the projections are distributed, along thebnten.-

edge of a portion of .t'h esection surrounding a;

portion only of the aperture, except"-at one-side-ACLv of the latter, and in which thetransyrse pres: sure is applied to the mount in a;'!fS.Stage in which the portions of the contaotigsotioris at'L said one. side of the aperture a'r left ii'liboded and in which thetransparency is moved;intozlnNumber '4. A. transparency mount comprising a paper blankhaving integrally connected sections folded intocontaotwith'one another andeach formed with-anaperturelinregister with the aperture in the other section, one of said sections having been initiallyembossed to provide projections extending away ffrom the side of vthat section adjacentv theyother side of the section and distributed along-the margin of a transparency seat on.

sad-section-surrounding the major portion, at

least/of the aperture in they latter, and adhesivey material between the contacting sides of said sections, saidmountzbeing compressbleto estab- 1ishathin adhesve bond between the portions 0 1 the-.sections surrounding said major portion said projections back into vthe body of the embossed section.`

5 A: transparencylmount comprising apaper blank havingintegrally connected sections folded into` Contact withoneanother and'each formed with an aperture in register with the aperture in theother section, one of said sections having beeninitially embossed to provide projections extending away from the-side of that section adjacent the; other side of the section and distribu ted along the margin of a transparency seat on said section .surrounding the aperture in the lattei'i a transparency between said sections comprsingl appr-tion vin register with said aperturesl and a rimportion engaging said seat, and adhesivelmaterial between the contacting sides of said sections; saidmount being compressed to establish athin adhesive bond between the portions of thesections surrounding said transparency and tosubstantially force said projection back.` into the bodyof the embossed section. v A

EUGENE G. SEARY.

REFERENCES CITED Thelvfollowingreferences are= of record in the' leof; this patent:

'TD STATES PATENTS A Name Date d Wheeler June 1,999,299 Mateo Apr. 14, 1928. 1,943,022 Koster Jan. 9, 1934 2,;34007 staehle y- Dec; 19,4939 2,352,243- Baidwin Jan. 27, 1944 2,395,541 Rum sept. 25, 1945 

